Chika Takami (高海 千歌 Takami Chika?)
Voiced by: Anju Inami
Chika is the main protagonist of Love Live! Sunshine!! and a second-year at Uranohoshi Girls' Academy. She is a big fan of μ's, and was inspired by them to become a school idol in order to save her own high school from closing down. Her family runs a traditional inn known for its open-air hot springs with an ocean view.

Riko Sakurauchi (桜内 梨子 Sakurauchi Riko?)
Voiced by: Rikako Aida
Riko is a modest, down-to-earth second-year from Akihabara who transferred from Otonokizaka Academy. She believes herself to have no special talent and thus has no interest in becoming a school idol, but is dragged into it by Chika.

Dia Kurosawa (黒澤 ダイヤ Kurosawa Daiya?)
Voiced by: Arisa Komiya
The prideful, third-year student council president of Uranohoshi Girls' Academy. She and her younger sister Ruby are part of a well-known and respected family. Dia reluctantly becomes a school idol after losing a match to Chika, but due to her character, will accept nothing less than victory at Love Live!.

You Watanabe (渡辺 曜 Watanabe Yō?)
Voiced by: Shuka Saito
An energetic second-year student with a positive outlook. You aims to one day become a ship captain, just like her father.

Yoshiko Tsushima (津島 善子 Tsushima Yoshiko?)
Voiced by: Aika Kobayashi
Yoshiko is first-year student with "chūnibyō" (中二病?, "delusions of grandeur"). She refers to herself as "Yohane", and describes herself as a fallen angel who has angered God, as she is always been extremely unlucky.

Hanamaru Kunikida (国木田 花丸 Kunikida Hanamaru?)
Voiced by: Kanako Takatsuki
Hanamaru is an easily-distracted first-year student whose family runs a local temple. She refers to herself in third-person as "Ola", a nickname she received from her best friend Ruby, and ends all of her sentences with "-zura". She is also a member of a local choir due to her talent at singing.

Mari Ohara (小原 鞠莉 Ohara Mari?)
Voiced by: Aina Suzuki
A third-year student at Uranohoshi. She is of mixed descent, her mother being Japanese while her American father runs a hotel chain in Italy. Mari is a bright person who prefers to take action by herself, and does not feel herself to be suited to become a school idol. Mari composes the music for Aqours, and her favorite music genre is industrial metal.

Ruby Kurosawa (黒澤 ルビィ Kurosawa Rubii?)
Voiced by: Ai Furihata
Dia's timid and crybaby little sister, Ruby has long since dreamed of becoming an idol. She has androphobia (fear of men), as she has never talked to anyone male outside of her own father. She sometimes refers to herself in third-person like her best friend, Hanamaru.